499999397 has 2 divisors, whose sum is σ = 499999398. Its totient is φ = 499999396.

The previous prime is 499999391. The next prime is 499999417. The reversal of 499999397 is 793999994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458345281 + 41654116 = 21409^2 + 6454^2 .

It is a cyclic number.

It is not a de Polignac number, because 499999397 - 2⁶ = 499999333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499999391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249999698 + 249999699.

It is an arithmetic number, because the mean of its divisors is an integer number (249999699).

Almost surely, 2^499999397 is an apocalyptic number.

It is an amenable number.

499999397 is a deficient number, since it is larger than the sum of its proper divisors (1).

499999397 is an equidigital number, since it uses as much as digits as its factorization.

499999397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44641044, while the sum is 68.

The square root of 499999397 is about 22360.6662915039. Note that the first 3 decimals coincide. The cubic root of 499999397 is about 793.7002069164.

The spelling of 499999397 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred ninety-seven".